Dim d1 As Date = e.Form.Controls("DateTimePicker1").value
Dim d2 As Date = e.Form.Controls("DateTimePicker2").value
Dim sd1 As String = e.Form.Controls("DateTimePicker1").value
Dim sd2 As String = e.Form.Controls("DateTimePicker2").value
If sd1 IsNot Nothing And sd2 IsNot Nothing Then
If d1 <= d2 Then
Chart.DataFilter = "[时间] >= sd1 And [时间] <= sd2"
End If
If d1 >= d2 Then
Chart.DataFilter = "[时间] >= sd2 And [时间] <= sd1"
End If
End If
如上程序,我做的图标需要有一个时间筛选的功能,后天的datatables有时间列,获取时间输入空间的时间变量一个是string,一个date;string用于判断时间区间是否有输入和筛选条件,但是条件表达式里面要使用“”我就纳闷了, 在双引号里面的变量系统要怎么才能识别是变量